ENGINE RELIABILITY IN HEAVY TRUCKS

Results are presented of what is considered to be the biggest fact-finding investigation into operators' experience of the reliability of the engines used in the heavier trucks. This investigation entailed analysing sample maintenance records of fleets running in total 9488 vehicles. Of these, 44 per cent were trucks grossing 30 tons and above, and 58 per cent of them were run by professional hauliers. The survey concentrated on engine types which had been in service long enough to reflect a whole life pattern - or which certainly had been in use long enough to clock at least 200000 miles. Tabulated results are presented of 'per cent fault incidence per engine', and 'cost per 100000 miles for repairs' for 16 engines. These results are discussed in relation to maintenance procedures, and information which showed that operators measure satisfaction more by reliability than by any other measure of performance, such as power, weight or fuel consumption. Data collated for each of the 16 engines indicate that, to summarise the repairs cost, pence per mile, taking into account the repeated fault incidence, spares prices and labour costs (the figures did not include routine maintenance), they were in ascending order: (1) Gardner 61xb, 0.265 (2) Gardner 81xb, 0.334 (3) Cummins 250, 0.394 (4) Leyland 112/760, 0.452 (5) Mercedes-Benz OM335, 0.743 (6) Cummins 220, 0.765 (7) Volvo TD100, 0.853 (8) DAF DU825, 0.893 (9) Man 232, 0.898 (10) Scania DS11, 0.943 (11) Rolls-royce Eagle, 0.951 (12) Magirus 4131v8, 1.392 (13) Volvo TD70, 1.469 (14) Leyland 680, 1.494 (15) Leyland 510, 1.591 (16) Scania DS8, 1.626. /TRRL/

  • Corporate Authors:

    Pergamon Press, Incorporated

    Maxwell House, Fairview Park
    Elmsford, NY  USA  10523
  • Publication Date: 1978-10

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00196914
  • Record Type: Publication
  • Source Agency: Transport Research Laboratory
  • Files: ITRD, TRIS
  • Created Date: Sep 15 1979 12:00AM